KR200342188Y1 - an insulator for transformer - Google Patents

Abstract

The present invention relates to a transformer insulator that can minimize the amount of leakage current leaking from a transformer by improving the configuration of the insulator. The configuration of the present invention relates to a metal fitting connected to an external power line and a power line connected to a winding coil of a transformer. A transformer insulator electrically connected to a metal fitting, the transformer insulator having a cylindrical first tube, at least one or more second tubes to be inserted into and fixed in the first tube, and the first It is characterized in that it comprises a connecting cap which is fitted to the tube and connects the conductive rod coupled to the bracket and the power line, and an injection molding molded in the outer diameter of the first tube and having a plurality of wing plates.

Description

Insulator for transformer

The present invention relates to a transformer insulator, and more particularly, to an insulator for a transformer which can minimize the amount of leakage current leaked from a transformer by improving the insulator configuration.

In general, insulators are installed on one side of a transformer, which is a device that changes the value of alternating voltage or current by using electromagnetic induction to support high voltage wires drawn from the outside, and also electrically connects the wires to the internal coil terminals of the transformer. As the insulating material for connecting as possible, the conventional transformer insulator is in the shape of a cylinder and has a plurality of wing pieces on the outer circumferential surface and is installed in part exposed to the transformer, and is installed on the top of the insulating housing and the external power line and electrical Conductive rod is connected to the wire, and is connected to the conductive rod is composed of a wire (power line) to electrically connect the external power line and the transformer.

However, in the case of the conventional transformer insulator as described above, the following problems are expected.

First, in the case of the insulating housing which is the main part of the insulator, in order to perform the function of the insulating material, since it is generally formed by forming a material such as magnetic material or silicon rubber, there is a disadvantage in that leakage current is severely generated when installed in the transformer. That is, this problem has caused a lot of problems in the safety of the transformer as a result, and also has the problem of bringing unnecessary power waste due to leakage current.

In addition, in order to perform an insulation function, the outside of the electric wire installed in the insulating housing is usually installed by inserting a paper tube (paper tube), which is an insulated tube.However, when the paper tube is used as described above, the paper tube itself is damaged by the insulating oil in the transformer. As a result of the failure or damage, the stability and the increase of the capacity of the transformer are the obstacles.

Accordingly, an object of the present invention for solving the above problems is to insert a plurality of second tubes into a cylindrical first tube in a transformer insulator electrically connecting a transformer and an external power line, The injection molding of the insulating housing with two wing plates minimizes the amount of leakage current generated in the transformer, thereby increasing the stability of the transformer and minimizing power consumption due to leakage current.

In addition, by inserting the insulating tube formed by the same material as the first tube and the same molding method to the outer diameter of the power line fitted to the inner diameter of the second tube body to prevent damage or damage to the insulation tube by the insulating oil in the transformer and It is to provide a transformer insulator that can minimize the leakage current generation amount.

The present invention for achieving the object as described above is a transformer insulator for electrically connecting the metal wire connected to the external power line and the power line connected to the winding coil of the transformer, the transformer insulator is cylindrical A connecting cap connecting a first tube, at least one or more second tubes to be inserted into and fixed in the first tube, and a conductive rod fitted to the first tube and coupled to the bracket and the power line. And, the injection molding on the outer diameter of the first tube and characterized in that it comprises an insulating housing having a plurality of wing plates.

1 is a view showing the overall configuration of a transformer insulator according to an embodiment of the present invention.

Figure 2 is a view showing the cut out the detailed configuration of the transformer insulator according to the present invention.

3 is an exploded three-dimensional view showing a part of the configuration of the transformer insulator shown in FIG.

Figure 4 is a graph measuring the current leaking from a transformer installed with a common insulator through a lightning shock wave test.

Figure 5 is a graph measuring the current leaking from the transformer insulator according to the present invention through the lightning shock wave test.

<Description of the symbols for the main parts of the drawings>

10: transformer insulator 12: insulated housing

14: wing 16: first body

18: 2nd tube 20: retaining ring

21: Connecting cap 22: Bracket

23: insulation pin 26: conductive rod

30: external power line 32: power line

34: insulator 40: transformer

42: winding coil

Hereinafter, a detailed description of a preferred embodiment of the present invention will be described with reference to the accompanying drawings. First, it should be noted that in the following description, only parts necessary for understanding the operation according to the present invention will be described, and descriptions of other parts will be omitted so as not to obscure the subject matter of the present invention.

1 to 3 is a view showing the configuration of the transformer insulator 10 to be implemented in the present invention.

Referring to the drawings, the transformer insulator 10 according to the present invention is installed on the upper end of the transformer, and is sequentially inserted into the first tube body 16 and the first tube body 16 to have an epoxy resin. It consists largely of a plurality of second pipe bodies 18 that are seated and fixed to the Jane ring (20). Wherein the first tube (16) is a mixture of fiberglass (FiberGlass) and epoxy resin or unsaturated polyester in a ratio of about 7: 3, and then the mixture through a pultrusion molding method or a filament winding method or a cross coating method Molding is preferable, and the first pipe 16 is formed by mixing the above materials in order to minimize the amount of leakage current leaked from the transformer 40.

And unlike the material of the first tube 16 described above, the second tube 18 is finely cut fiberglass into a shape of 촙, and then the fiberglass 촙 and the resin, preferably epoxy resin or unsaturated polyester Mixing in a ratio of 3: 7 to make a dough (frozen rice cake) state, and then the dough is preferably produced by the compression molding method, and thus the second tube 18 is composed by mixing the above materials Also to minimize the amount of leakage current leaked from the transformer 40, the same function as the first tube 16 described above. In addition, the second tubular body 18 may be molded in various lengths, but in the present invention, it is most preferable that the second tubular body 18 is manufactured to have a length of about 15 cm and configured to be inserted into the first tubular body 16. That is, the reason for this is that as the second tube 18 is manufactured by the compression molding method as mentioned, if the second tube 18 is molded to have an appropriate length, for example, 15 cm or more, It is unpreferable because there exists a possibility that a bubble may generate | occur | produce in the two pipe | tube 18. In addition, although the length of the second pipe 18 may be molded to 15 cm or less, in this case, it is not preferable to bring an increase in the number of work due to the increase in the number of assembly.

That is, by configuring the insulator 10 for the present invention using the first tube 16 and the second tube 18 as described above, it is possible to minimize the current leakage from the transformer 40, such a feature Will be clearly understood by the following detailed description of FIGS. 4 and 5.

4 is a graph measuring the current leaking from the transformer is installed in the general insulator through the lightning shock wave test, Figure 5 is the current leaking from the transformer is installed in the insulator according to the present invention through the lightning shock wave test One graph. That is, in the case of the general insulator 10a, it can be seen that the leakage current is excessively emitted around the insulator 10a as shown in FIG. 4, and in the case of the transformer insulator 10 of the present invention, FIG. As shown in FIG. 2, leakage currents emitted around the insulator 10 are hardly generated.

On the other hand, inside the upper end of the first tubular body 16 configured as described above, as shown in Figures 2 and 3, the connection cap 21 is fitted and fastened and fixed by the insulating pin 23, the connection cap 21 as described above Insulated housing 12 is formed of a silicon material and a plurality of wing pieces 14 are integrally attached to the outer diameter of the first tube 16 formed by fitting. Here, the connection cap 21 is a vapor pressure (increased pressure) generated from the insulating oil in the transformer 40 with the function of interconnecting the conductive rod 26 and the metal fitting 22 to be described later the first tube 16 is Since the connection cap 21 which performs the function of preventing the departure, the same material and the same molding method as the second tube 18 mentioned above, that is, the fiberglass 글 and the resin, preferably Epoxy resins or unsaturated polyesters are mixed in a ratio of about 3: 7 to form a dough, and then the dough is produced by a compression molding method. In addition, the insulating pin 23 for fastening and fixing the connection cap 21 and the first tubular body 16 is preferably manufactured by the same material and the same molding method as the first tubular body 16.

On the other hand, the transformer insulator 10 configured as described above, preferably the upper surface of the first tube 16 is provided with a bracket 22 for supporting the external power line 30 is connected to the first tube ( The inner diameter of the plurality of second tubular bodies 18 inserted into the power supply 16 includes a power supply line 32 and a power supply line 32 connected to a transformer 40, preferably a winding coil 42 of the transformer 40. The conductive rod 26 coupled to the tip of the inner pole is installed, and the conductive rod 26 inserted into the second tubular body 18 is the first tubular body 16 described above with reference to FIGS. 2 and 3. It is electrically connected to the bracket 22 through the connection cap 21 is fitted on the top of the). That is, the conductive rod 26 and the bracket 22 are connected through the connection cap 21, so that the transformer 40 may have a structure electrically connected to the external power line 30.

On the other hand, the insulating tube 34 for performing the insulating function is fitted to the outside of the power line (32). Here, the material of the insulator tube 34 is the same material and method as the material of the first tube member 16 described above. Preferably, the fiberglass and the epoxy resin or unsaturated polyester are mixed at a ratio of about 7: 3 to draw or It is preferable to mold by a filament winding method or a cross-coating method. Thus, the insulation tube 34 is formed of the same material and method as that of the first tube body, so that the insulator 10 of the present invention is installed in the transformer 40. In this case, as shown in FIG. 1, in order to prevent damage or damage by the insulating oil 43 in the transformer 40 in addition to the insulating function, and to minimize the amount of leakage current in the transformer 40.

As described above, the present invention inserts a plurality of second tubes into a cylindrical first tube and injection molding an insulating housing having a plurality of wing plates therein, thereby reducing the amount of leakage current generated in a transformer. By minimizing, there is an advantage of minimizing power consumption due to increased transformer stability and leakage current.

In addition, by inserting an insulated tube formed by the same material and the same molding method as the first tube in the outer diameter of the power line fitted to the inner diameter of the second tube body to prevent damage or damage to the insulated tube by the insulating oil in the transformer There is an advantage to minimize the amount of leakage current in the transformer.

Claims (5)

In the transformer insulator, which electrically connects the bracket 22 connected to the external power line 30 and the power line 32 connected to the winding coil 42 of the transformer 40 with the bracket 22, The transformer insulator 10; A cylindrical first tube body 16; At least one or more second tubes (18) fixedly inserted into the first tube (16); A connection cap 21 inserted into the first tube 16 and connecting the metal fitting 22 and the conductive rod 26 coupled to the power line 32; Insulator for transformer, characterized in that the injection molded in the outer diameter of the first tube (16) and comprises an insulating housing (12) having a plurality of wing plates (14). The insulator for a transformer according to claim 1, wherein an insulator tube (34) is fitted in an outer diameter of the power line (32). The insulator for a transformer according to claim 1 or 2, wherein the first pipe (16) and the connection cap (21) are fastened and fixed by an insulating pin (23). 3. The transformer insulator according to claim 2, wherein the first pipe body (16) and the insulated pipe body (34) are made of fiberglass and mixed with any one material of epoxy resin or unsaturated polyester. 4. The transformer insulator according to claim 3, wherein the second tubular body (18) is formed by mixing the fiberglass shock with any one material of epoxy resin or unsaturated polyester to form a dough.